Smoke-consuming furnace



(No Nudel.) 2 sheets-sheet 1.

P. FLBMING au W. J. WALSH. SMOKE GONSUMING PURNAGE.

f rf,

(No Model.) 2 Sheets-Sheet 2.

P. FLBMING & W. J. WALSH. SMOKE GUNSUMING FUBNAGB.

No. 566,674. Patented Aug. 25, 1896.Y

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Vlllll Il Illl l I l I UNITED STATES rrrcn.

PATENT SMOKE-CONSUIVIING FURNACE.

SPECIFICATION forming part of Letters Patent No. 566,674, dated August 25, 1896.

Application filed January 25, 1896. Serial No. 576,884. (No model.)

To ci/Z 'whom zizi may concern.'

Be it known that we, PETER FLEMING and `WILLIAM J. VALSH, citizens of the United States, residing at Butte, in the county of Silverbow and State of Montana, have invent ed a new and useful Smoke-Consuming Furnace, of which the following is a specification.

This invention relates to smoke-consuming furnaces; and. it has for its object to eect certain improvements in furnaces of this character whereby the smoke will be entirely consumed and the greatest amount of heat obtained from the nre with the use of but a minimum amount of fuel.

To this end the main and primary object of the invention is to provide a smoke-consum ing furnace which shall provide for the thorough consumption of the smoke in such a manner that a great saving of fuel will be effected.

Vith these and other objects in view, which will readily appear as the nature of the invention is better understood, the saine Vconsists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and claimed;

In the drawings, Figure 1 is a vertical longitudinal sectional view of a steam-boiler furnace constructed in accordance with this invention, the pipes Outside of the furnacecasing being shown in elevation. horizontal sectional view on the line 2 2 of Fig. l. Fig. 3 is a transverse sectional view on the line 3 3 of Fig. 2. Fig. e is a similar view on the line #i e of Fig. 2. Fig. 5 is an enlarged detail sectional view of one of the combined steam and hotair distributing jets.

Referring to the accompanying drawings, the numeral 1 designates a furnace-casing, within which is mounted an ordinary boiler 2, provided with a steam-dome 3, projected above the top of the casing l, and having an ordinary safety-valve 4. The boiler 2 is mounted within the furnace-casing in any suitable manner so as to provide for the circulation of the heat and other products of combustion under the boiler throughout its entire length and through the ilues thereof to the front end of the furnace-casing, with which is connected an ordinary smoke-stack 5, which forms the main draft-due of the furnace.

Fig. 2is a The furnace casing l is provided at its front end, below the front end of the boiler 2, with the usual iire-box 6, inclosed at one side by the main front bridge-wall '7, arranged transversely within the furnace-casing and extending from side to side thereof. ln rear of the front bridge-wall, below the boiler 2, are successively arranged an intermediate and rear bridge-wall 8 and 9, respectively, which are also disposed transversely within the casing and extend across the space between its side walls. The bridge wall 9 is disposed directly below the rear end of the boiler 2, near the rear end of the furnacecasing, while the intermediate bridge-wall S is located at a point between the front and rear walls 7 and 9, and incloses therebetween and the said wall 9 an enlarged rear combustion-chamber lO, which is located below the rear portion of the boiler 2, and is designed to provide for the complete combustion of the smoke therein before the heat and other products of combustion pass into the iiues at the rear end of the boiler.

The products of combustion from the firebox pass under the boiler and over both of the bridge-walls and S before the same enter the combustion-chamber lO under the rear portion of the boiler, and in order to provide for the proper deflection of the smoke and other products of combustion toward the center of the combustion-chamber 10 a pair of vertical baiiie-walls 11 is employed. The vertical baffle-walls 11 are arranged adjacent to and in rear of the intermediate bridge-wall 8, and are built at opposite inner sides of the furnace-casing l, so as to extend up from the floor thereof to the under side of the boiler 2, whereby the smoke and other products of combustion which pass over the wall 8 will necessarily be contracted and deflected toward the center of the chamber 10 in order to secure the desired result.

The front and intermediate bridge-walls 7 and S are provided longitudinally therein with hot-air passages 12, which are connected together by an intermediate hot-air ilue 13, built longitudinally within the furnace-casing between the two walls 7 and 8, and said hotair flue 13 communicates at one end with the passage 12 of the wall 7 at an intermediate point, and at its.other end communicates with IOO the passage 12 of the wall 8 at an intermediate point, so that a direct and continuous communication is provided between the airpassages in. the said bridge-walls 7 and S. The air-passage in the front bridge-wall 7 opens at one end outside of the furnace-casing, as at 14, to provide for taking in fresh cold air from outside of the furnace, which cold air becomes heated as it circulates through the air-passages of the front and intermediate bridge-walls and in the hot-air flue connecting such air-passages.

A steam-supply pipe 15 leads from the outside of the furnace-casing into the air-passage 12 of the wall 7, and extending through the flue 13 connects with a jet-pipe 1G, arranged longitudinally within the air-passage 12 of the wall 8, and is provided at its opposite ends with the rearwardly-extendin g arms 17, which project through the vertical baffle-walls 11 and into the combustion-chamber between the f walls 8 and 9, as clearly illustrated in Fig. 2 of the drawings. The j et-pipe 1G and the extremities of the pipe-arms 17, within the chamber 10, carry combined steam and hotair jets 18, which provide for jetting a mixture of dry hot air and steam into the smoke.

and other products of combustion as the same pass over the wall S and into the chamber 10. The jet-pipe 16 carries a series of the jets 18, which jets project outzof the air-passage 12 of the wall 8 to a point above the top of the wall, so that the jet of steam and hot air will be distributed directly into the smoke to supply the latter with sufficient oxygen in the best possible condition to insure the complete combustion of the smoke. The said combined steam and hot-air distributing jets 1S essentially consist of an exteriorly-threaded heavy brass non-corroding steam-nipple 19, connected at its lower end to the pipe supplying steam thereto, and a discharge-tube 2O ofa greater diameter than and arranged in line with and beyond the exteriorly-threaded nipple 19.

The discharge-tube 2O of each distributingjet is provided at its lower end with an enlarged air-bulb 21, provided in the sides thereof with a series of hot-air-inlet openings 22, and also provided in its lower end with a threaded opening 23, engaging the exterior threads of the steam-nipple 19.

In operation the steam is discharged out of the nipple 19 into the tube 20, and a suction is necessarilyproduced in the bulb 21, which draws in hot air through the openings 22 .from the passage 12, in which the jet is located, and as the operation continues the steam and hot air become thoroughly commingled, and in such condition are discharged out of the tube 20. By adjusting the position of the bulb 21 on the exteriorly-threaded nipple 19 it will be readily understood that the suction of the jet may be increased or diminished, so as to accurately regulate the amount of hot air and steam which is to be j etted into the smoke.

By reason of arranging the steam-supply pipe 15 in the hot-air passage 12 of the wall 7 and in the hot-air flue 13 the steam conducted through such pipe is necessarily superheated and thoroughly dried before it reaches the combined steam and hot-air distributing jets, and is therefore in the best possible condition for doing effective work in connection with the hot air that is drawn into and discharged out of the jets. The said steam-supply pipe 15 has-suitably connected therewith, outside of the furnace-casing, the branch steam-pipes 24E and 25, respectively, the latter of which pipes, 25, is preferably connected with the steam-dome 3 of the boiler, and is provided with a suitable valve 26, so that communication with the pipe l5 maybe controlled as desired. The other branch steam-pipe 24 connects with-the steam-drum 27, which is mounted inside the smoke-stack 5, near the base thereof, and said steam-drinn is kept supplied with steam bythe pipe 2S, which connects at one end with apipe-coil 29, arranged at an intermediate point within the combustion-chamber 10, and is designed for the generation of steam to supply the same to the annular steam-drum 27. The steamgenerating coil 29 is preferably supplied with water by the feed-pipe 30, suitably connected at one end with said coil and at its other end with the mud-drum 31, which is connected with the rear end of the boiler and to the lower side thereof to subserve its usual function, and at this point it will be noted that all of the pipe connections are provided with suitable valves so that the iiow therethrough may be regulated or cut off at any time desired. By reason of having the separate steam-pipe branch connections 24 and 25 with the pipe 15 such pipe 15 may be supplied with steam from either or both of `said pipes 24 and 25, as the requirements of the furnace may demand, it being noted at this point that the steam in the drum 27 is necessarily superheated and thoroughly dried, `and at times it may be necessary to modify this vcondition of the steam by combining the same with the steam conducted directly from the steamspace in the boiler by the pipe 25.

From the foregoing it is thought that the construction and operation of the herein-described smoke-consuming furnace `will be readily apparent by those skilled in the art, and it will be understood that changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, is-

1. In a smoke-consuming furnace, the combination with the furnace-casing and the boiler therein; of an intermediate and rear bridge-wall respectively arranged within the furnace-casing below the boiler at an intermediate point and at its rear end, said interlos mediate and rear bridge-Walls confining therebetween an enlarged combustion-chamber, and the intermediate bridge-Wall being provided with a longitudinally-disposed hot-air passage, a pair of vertical battle-walls arranged at opposite inner sides of the furnacecasing adjacent to and in rear of the bridge- Wall and extending from the iioor of the easing to the under side of the boiler, a steamj et pipe arranged Within said hot-air passage and provided at its ends with rearwardly-extending arms projected through the baffle- Walls into said combustion-chamber, and a series of combined steam and hot-air jets fitted to said jet-pipe and to the rear extremities of the arms thereof, the jets fitted to the jet-pipe being projected above the top of the intermediate bridge-Wall, substantially as set forth.

2. In a smoke-consuming furnace, the combination. With the furnace-casing and the boiler therein; of the separated front and intermediate bridge-Walls provided longitudinally therein with air-passages, the air-passage of the front bridge-wail opening at one end outside of the furnace-casing, a hot-air iiue built between the tivo bridge-Walls and communicating at its ends With the air-passages therein, a steam-jet pipe arranged in the air-passage of the intermediate Wall and provided With a series of combined steam and hot-air jets projected above the top of the in terinediate Wall, and a steam-supply pipe leading from a point of steam supply into the air-passage of the front bridge-Wall and eX- tending through the hot-air flue to said steamj et pipe, substantially as set forth.

3. In a furnace of the class described, the combination With the furnace-casing having a smoke-stack, and the boiler arranged Within the furnace-casing; of an intermediate and rear bridge-Wall respectively arranged below the boiler at an intermediate point and at its rear end, said bridge-walls confining therebetween an enlarged combustion-chamber, a suitably-arranged steam-jet pipe, a steamdrum mounted inside the smoke-stack, a steam-supply pipe connected With said steamjet pipe and having branch connections respectively' With said steam-drum and the boiler, and a steam-generating-pipe coil arranged Within said combustion-chamber and having a feed-Water-pipe connection and a steam-pipe connection with said steam-drum, substantially as set forth.

In testimony that We claim the foregoing as our own We have hereto affixed our signatures in the presence of two witnesses.

PETER FLEMING. WILLIAM J. WALSH. Witnesses JOHN LINDSAY, JOHN KnLsEY. 

